This is partially in response to Clem’s excellent article about the importance of timetables. I do agree with most of what he says, however I’d like to add one point to the discussion: He makes it sound a bit as if CAHSR and Caltrain would compete, not cooperate - thus the argument that CAHSR trains might “block” Caltrain from running a proper timetable.
However, if we have CAHSR “locals” running over those tracks, say at a half-hourly interval, with timetables that are coordinated with Caltrain locals and are offering those zero-wait transfers at RWC (or wherever), then there should in fact not even be a need for Caltrain express trains? The CAHSR trains can fulfill that function. But for that to work it is very important that fares and timetables are coordinated, i.e. if I have a ticket for San Jose - San Francisco, I should be able to use any train on the route.